Samiksha Jaiswal

Annularia

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Kingdom  Plantae
Class  Equisetopsida
Rank  Genus
Division  Pteridophyta
Family  Calamitaceae
Order  Equisetales
Annularia Fossil Record of the Sphenophyta
Similar  Calamites, Sphenophyllum, Pecopteris, Neuropteris, Alethopteris

Annularia pronounciation


Annularia is a plant fossil belonging to the order Equisetales.

Contents

Annularia how to pronounce annularia


Description

Annularia Calamites carinatus Annularia stellata Calamites calamariophyllum

Annularia is a form taxon. It is the name given to Calamites leaves. In fact the stems and the radiating structures of the leaf whorls is similar in the Calamites, an extinct genus of horsetails.

Annularia httpsuploadwikimediaorgwikipediacommonsthu

These horsetails, belonging to the class of Sphenopsida, were arborescent and grew to a height of 32 feet (10 meters) in a tree-like form.

Annularia Annularia Plant Fossils

Annularia leaves are arranged in whorls of between 8-13 leaves. Its shape is quite variable, being oval in Annularia sphenophylloides and between linear and lanceolate in Annularia radiata, but they are always flat and of varying lengths.

Fossil records

Annularia Annularia

Fossils of this genus have been discovered in the Permian strata of Russia and in the Carboniferous (around 360 to 300 million years ago) strata of the United States, Canada, China and Europe.

Annularia Annularia

References

Annularia Wikipedia


Similar Topics
Calamites
Neuropteris
Pecopteris
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